A 52-year-old white female nurse with a medical history that was notable for hypertension and mild obesity presented to her local primary care physician with the recent onset of chest pain. Further investigation revealed that in an effort to lose weight and assist in the control of her hypertension, she had adopted a new diet and exercise program several weeks earlier. At her initial presentation, she described 48 hours of nonexertional, sharp chest pain that was aggravated by elevation of her right arm and deep inspiration. She denied associated symptoms of shortness of breath, nausea, vomiting, or diaphoresis, and her office electrocardiogram showed no abnormalities.